Nicole Starosielski, a UC Berkeley professor and author of The Undersea Network, and Frank Gardner, BBC's security correspondent, delve into the hidden world of undersea cables that underpin global communication. They reveal how these fragile cables, vital for internet connectivity, often suffer accidental damage and are vulnerable to sabotage amid geopolitical tensions. Notably, they discuss the havoc wreaked during Tonga’s volcanic eruption on communications and the urgent need for better protection against rising threats. Tune in for a fascinating exploration of our underwater lifelines!